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/N ratio dropped to 21.1 and 21.9 in 6- and 7-month old plants, respectively ( Fig. 1 ). Fig. 1. The carbon/nitrogen (C/N) ratio of Phalaenopsis Sogo Lotte ‘F2510’ at various plant ages. Vertical bars indicate se of 12 replications. Means with
known mechanism for perennial plants to conserve and reuse stored N that can substantially impact the N use efficiency ( Coleman et al., 2004 ; Hinesley et al., 1991 ). Nitrogen shortages lead to reduction of the RuBisCo (ribulose-1, 5-bisphosphate
, allocation, and carbon/nitrogen (C/N) ratio in tissues in May 2013 of container-grown ‘Immortality’ tall bearded iris fertigated with five different N rates. Nitrogen allocation trend was similar to the DW allocation to different tissues. The close
treatment ( Table 3 ). Similar examples for preferential partitioning of photosynthetic carbon to the roots and decrease in shoot–root ratio are well documented for other species under N deficiency ( Hermans et al., 2006 ). Nitrogen-deficient Eustoma
lamps from 0600 hr to 2000 hr daily. Cation exchange capacity, carbon-to-nitrogen ratio, particle size distribution, and bulk density. Cation exchange capacity, C:N ratio, particle size distribution, and BD were determined for five treatments: non
, and it is also an important factor to improve yield and quality of tea ( Ruan et al., 2001 ). Nitrogen, either from organic or mineral fertilization, plays an important role in the growth and development of tea tree. Meanwhile, it is an important
contrast to total N content, in our 15 N tracer uptake observations, the aboveground tissue 15 N enrichment was greater in PreHerb trees than Sod or Mulch trees, except for trunk and scaffold biomass ( Fig. 7A ). For belowground tissues, the δ 15 N ratios
C and N from Sept. 2005 to Sept. 2007 as affected by groundcover and compost rate. z Nitrogen supply in BSM was consistently elevated relative to BG, except in Apr. 2006 and Sept. 2007 ( Table 4 ). Total soil C and N and C:N ratio were similar among
, synthetic sources of nitrogen (fixed by the Haber–Bosch process) are energy intensive to produce, prohibited by agencies that certify organic practices, and do not provide a source of carbon to build soil OM ( Crews and Peoples, 2004 ). The use of composts
N immobilization. Treating (precharging) wood-based substrates with N before planting is a strategy to decrease the C:N ratio and hence reduce the requirement for additional fertilizer N for plants grown in wood-based substrates as a result of